Automatic aib cibctoatob



H. vv. NEAL. I AUTOMATIC AIRCIRCULATOR FOR HEATING FURNACES. APPLTCATION FILED DEC.2B. 1921.

so v

of a building showing' a hot-air K supplyv pipe and register, wit

close 'untreu stares earner cerraronC7 HARRY W. NEAL, 0F INDIANAPOS, NDANA, ASSEGNOR 0F UNE-HALF T0 HALL- NEAL FURNACE COMPANY, 0F ENDANAFOLS, ENDXAN, A CORPORATON @E rnnrnne..

U'TGMATIC AIR IRCLATOR FOR HEATH@ FURNCES.

Specification of Letters Patent. Patented Aug. 22, 11922.,

Application led December 2g, 1921. Serial No. 525,277,

To all whom it may concern, if

Be it known that l, HARRY W. NEAL, a

citizen of the United States. residing at Indianapolis, in the county of Marionand State of lndiana` have invented new and,

conditions that the flow of air will be Sullicient after it has been started through the p1pe.

` rllhe object of my invention is to provide a portable means for creating a vaccum at the register end of hot-air pipes that are not supplying heat in proper quantities, in order tov start the flow of air through said 'oipes or tocontinue "said low in such cases where that is required.

l accomplish th-ese objects and other minor ones which` will hereinafter appear, by the mechanism illustrated in the accompanying drawing, in whichT Fig. 1, is a vertical section of a portion my invention operatively installed on the register. Fig. 2, isa view in side; elevation of my device. Fig. l3, is an underside plan viewof the device illustrated in Fig. 2, Fig. l is a view in side elevation, on a larger scale, of a form of thermostat useful in automatic operation oi my improvement.

Referring to Fig.

to rest upon the top of thev register,upon

the frame portion surrounding the usual grille work. Froml the top of the memberr 10,is an extension with vertical walls 11,v

with suitable air-openings 12 formed therein for the free discharge of hot-air therethrouigh. rlihe top of the extenslon 11 is 1, 5 is the floor, 6 a. wall, 7 a hot-air supply pipe, 8 a {loer-boi:v

by `a plate 12l having a' central recess 13 with downwardly tapering walls funnel-like in shape for the double purpose of acting as a deflector of the h0t-air coming' up through the register, and for discharging it through the openings 12; and also providing a suitable recess within which an electric-motor 14 of "any usual or preferred design is mounted and protected. -At the bottom or apex end of the conical portion 13 is a' suitable bearing for the motor shaft, which extends therethrough, and on the extending endv of said shaft is a cross-arm 15, and on each end of said arm, close to the walls 11, are the oblique fanblades 16, the obvious purpose of which is to blow the hot-air out of the body 10. by

the rotation of the motor shaft, thereby creating a partial vacuum in said body 10, whlch in turn produces a suction and draft through the pipe 7 of hot-air from the fur- 1 nace. This induced draft will` continue as long as the motor remains in operation.

Frequently, after the pipe -7 has become heated and theilow of air has been started through it, the flow will continue without further requirement of rotating fan-blades. in which event'the device will be lifted 0 theregister, and may be used elsewhere it neede v However, should weather conditions make the continued use of my device desirable,

it may be allowed to remain in operation, and to start its operation automatically when the temperature of the room drops below a predetermined minimum, and also to stop the motor and fan when amaximum 'room-temperature has been reachedll prefer to introduce a thermostat 18 inthe electric circuit through which current is.

supplied when operating the motor. This is shown in a simple form in Fig. f1, wherein a bar 17 of two unequally expanding metals are utilized in the welllmown way Y to make and break the circuit at terminals 19. rllhe device may bel provided with a screw-plug 20 to be screwed into an electric light-socket ora base-socket, where the latter is available. 'llhe device may be used with a wall radiator by suitably suspending it there.

therefore do not desire to be unduly limited t0 the form here illustrated and de-l scribed, nor any more than is required bythe app-ended claims, and What claim 1sl. ln a hot-air heating system, the come bination with a hot-air supply pipe and register, of a portable hood to cover the register, said hood having a top outlet, a horizontally rotating fan located at the outlet and having relatively Small radial arms terminating with vertical end Vanes to insure minimum obstruction to the passage of air, and a top above the hood outlet having a funnel shaped member extending between the blades of the fan and direeting the discharge of air between the cap Iand the hoodB iftaeseee 2. ln a hot-air heating system, the combination with a hot-air supply pipe and register, of a portable hoodto oover'the register, said hood having a top outlet, a horizontally rotating fan located at the outletand having relatively small radial arms terminating With vertical vanes to insure minimum obstruction to the passage' of air, a top above the hood outlet havingr a funnel shaped member. extending` between the blades of the fan and directing,` the dis- Charge or" air between the cap and the hood, and a motor in the funnel shaped member drivingly connected with the fan.

Signed at indianapolis, Indiana, this the 23rd day of December 1921.

HARRY vv. NEAL. 

